Re: Raspberry Pi 3B: /dev/mem mmap GPIO works on earmv7hf but not on aarch64

[Jason Thorpe <thorpej%me.com@localhost>]

> On Feb 16, 2026, at 2:34 PM, Nick Hudson <nick.hudson%gmx.co.uk@localhost> wrote:
>> - Does the described behavior sound like a cache attribute / pmap issue,
>>   or could it be an address translation issue?
> 
> There is no support for device type memory mappings via /dev/mem
> 
> What's wrong with gpioctl(8)?

I suspect it’s a Linux program and that gpioctl is too slow.

-- thorpej